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In catalyst activity testing, micro-packed-bed reactors are the most commonly used devices. However, the small particle sizes (typically 0.05–0.2mm) inherent with these microreactors in multiphase systems do exhibit special hydrodynamics characteristics, that are not generally recognized.Cold three-phase model investigations show that in micro-packed-bed reactors segregated flows of gas and liquid...
This work investigates the feasibility of ultra-deep hydrodesulfurization (i.e. ⩽1ppm of sulfur content) of several diesel feedstocks, viz., regular (R), premium (P) and hydrotreated straight-run (HSR) at low pressures, i.e. 10bar, to lower significantly the operation costs. The premium and regular diesel contain additive packages with several components such as cetane boosters, antioxidants that...
The scaling down of trickle bed reactors for catalyst testing in deep hydrodesulphurisation (HDS) is evaluated. A multiphase micro-reactor system has been built specifically for HDS, consisting of a set of six 2mm diameter packed beds with particles of approximately 100μm. To confirm plug-flow behaviour (for integral conversion) and to guarantee the measurement of true kinetics, the hydrodynamics...
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